Essential oils are mixtures of various chemical substances
biosynthesized by plants , which give the characteristic smell some
flowers , trees, fruits , herbs, spices , seeds and certain extracts of
animal origin ( musk, civet , ambergris ) . These high aromatic ,
non-fat (thus not become rancid ) inherently volatile chemicals (
evaporate quickly ) and lighter ( less dense ) . They are insoluble in
water, slightly soluble in vinegar , and soluble in alcohol, fats,
waxes , and vegetable oils . Are oxidized by exposure to air . Were
extracted over 150 types , each with its own unique flavor and healing
properties . They come from common plants such as parsley and as
exquisite as jasmine. To do their best, must come from natural raw
ingredients and be as pure as possible .

Properties:
All essential oils are antiseptic , but each has its specific virtues ,
for example can be analgesics, fungicides, diuretics or expectorants.
The meeting of each oil component also acts together to give the oil a
dominant feature. It can be as chamomile , refreshing as grapefruit ,
aromatic stimulant like rosemary or soothing like cloves .

In
the body, the essential oils may act pharmacological, physiological and
psychological mode. Usually produce effects on various organs
(especially the organs ) and various functions of the nervous system.